Holley Water Injection Pump (HO557-100)
SKU: 33823645657

Holley Water Injection Pump (HO557-100)

Sale price$270.90 Regular price$301.00
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Ships within 48 hours · Estimated delivery Jul 4 - Jul 9

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Description

Holley Water Injection Pump (HO557-100)HO557 100 WATER METHANOL PUMP Water Methanol Part Number: HO557 100 Take your forced induction ride to the next level with a Holley water meth injection system! Integrated into the Holley HP and Dominator EFI Systems is the capability to control water methanol injection, allowing you to safely run on lower octane pump gas! What makes the Holley water methanol system unique and light years ahead of competitive systems, is that the solenoid flow has

HO557-100 - WATER/METHANOL PUMP

Water/Methanol

Part Number: HO557-100

Take your forced induction ride to the next level with a Holley water/meth injection system! Integrated into the Holley HP and Dominator EFI Systems is the capability to control water/methanol injection, allowing you to safely run on lower octane pump gas!
What makes the Holley water/methanol system unique and light years ahead of competitive systems, is that the solenoid flow has been characterized within the ECU. Program in an exact flow amount into the software, and that flow is injected into the engine. This is critical to ensure that neither too little (causing engine damage), nor too much (causing a large loss in power) water/methanol mix is injected into the engine. Select the exact percentage of water/methanol mix to be delivered vs. the percentage of fuel flow present, at any RPM and load. This makes tuning a very simple and accurate process.
All components are designed to be compatible with water/methanol mix of up to 50% methanol. The Water/Meth solenoids are run by an injector driver output. If an extra output is not available (as would be the case on a HP ECU driving 8 injectors), PN 554-115 can be purchased that can be driven by a low side PWM output.

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Exchange/Return Notes
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SKU: 33823645657

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H. Dorner
Port Orchard, US
★★★★★ 1
Did not protect
Size: 3.4 Fl Oz (Pack of 1), Style: SPF 50
Product smells great and goes on better than most mineral sunscreens. It was labeled as "reef safe" so I assumed it would work well in water. It did not. After just a half hour in the Caribbean water, my skin was red. The product did not say "waterproof" so we decided to use it only when we were away from the beach. Unfortunately, even in the cold spring weather of our northern climate we still ended up with red skin. We had no choice but to throw away the rest of the bottle. Do not expect this lotion to protect you from the damaging rays of the sun.
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Reviewed in the United States on May 8, 2026
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Raul D
New York, US
★★★★★ 5
Sunscreen
Size: 3.4 Fl Oz (Pack of 1), Style: SPF 50
Great sunscreen. You do have to really work into your skin.
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Reviewed in the United States on May 6, 2026
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Torie
Lowell, US
★★★★★ 5
Great sport block for sensitive skin
Size: 3.4 Fl Oz (Pack of 1), Style: SPF 50
I use this whole playing tennis or pickleball, it might be a little much for everyday. Does not irritate my sensitive skin. Rich enough for dry skin. Very slightly white cast that quickly fades. Does not run or bother my eyes for sports. Basically perfect in all categories.
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Reviewed in the United States on March 10, 2026
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myrasam79
Lake Worth, US
★★★★★ 5
Recommend!
Size: 3.4 Fl Oz (Pack of 1), Style: SPF 50
This is my 2nd time purchasing this. I like it compared to others.
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Reviewed in the United States on April 27, 2026
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Amazon Customer
Chelsea, US
★★★★★ 5
Works great
works great. I use it on my nose and back of my hands. not sticky or greasy. Smells nice convenient small purse size, with cap that stays on well.
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Reviewed in the United States on April 24, 2026

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